其中k1-k5,5个分程序可以单独执行，在k0程序中以子程序出现，注意：每个 程序作为子程序后，加上ret,去掉ljmp-Where k1-k5, 5 sub-programs can be individually implemented programs to subroutines in k0 appear NOTE: each program as a subroutine, coupled with the ret, remove ljmp